His TV ratings internationally where amazing, and thats why he was the highest paid fighter at the time. I think that critique maybe more in tune with louis
Tho technically with Oscar the first thing that popped in my head was Oscar meyer:hey or the Oscar's awards Ali and Tyson are more differentiable yet still easy to remember names
And people would have sat around listening to the radio more so as there were less options. He belonged to an era where segregation was higher, there was war and people needed a hero. Undoubtedly though Ali is the most wellknown. My votes would be Ali, Tyson and Louis.